Cushioned stock for firearms.



No. 8 37,601. PATENTED DEG-"1, 1906.

B. BEER. GUSHIQNED STOCK FOR FIREARMS;

APPLICATION rm n NOV. 27. 1906.

I A z I 6 6' 0 z 1 g {M I A I\\ %&

@&

ms Nomi): PETERS co-, WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

CUSHIO NED STOCK FOR FIREARMS.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed November 2'7, 1905. Serial No. 289.284.

To all whom it may concern:

Be it known that I, BURKARD BEER, a subect of the German Emperor, and aresident of Hamburg, in the German Empire, have invented certain new anduseful Improvements in Cushioned Stocks for Firearms, of which thefollowing is a specification.

The present invention relates to improvements in small-arms, and moreparticularly refers to a recoll-brake 1n such arms.

Small-arms are already known in which the butt of the gun is arranged upon the end of the stock in such a manner as to be longitudinallydisplaceable, springs being interposed between the two parts forabsorbing the recoil.

In accordance with the present invention the springs are replaced by anair-brake, by which means a far more reliable and uniform and especiallya readily-adjustable braking action is obtained. Preferably theair-brake is combined with a liquid-brake, with which construction thedimensions of the pressurefaces may be kept Within very small limits. Arecoil-brake of this construction is illustrated in the accompanyingdrawings, in which Figure 1 represents a longitudinal section throughthe butt of a rifle, and Fig. 2 is a section on the line A B.

' The butt I) is passed upon the end of the stock a in such a manner asto be displaceable in the longitudinal direction. A metal cylinder 0 isinserted in the end of the stock, where it is held by the screw i. Thecylinder 0 is of smaller diameter at its front portion 0 than. at itsrear part 0 In this cylinder there engages a piston d, fixed in the buttb,

the diameter of this piston substantially corresponding with the bore ofthe cylindrical portion a, while it is provided with a flangelikeprojection e, forming a piston for the part 0 The part c is providedwith fine passages e. The rear end of the cylindrical part c isobturated by the bottom piece f, screwed therein. A spring 9 is alsoprovided in the stock a, and in rear of this spring a sliding plunger orbolt his fixed in the butt I). The cylindrical part c is filled with aliquid, such as oil, glycerin, or the like.

When the weapon is fired, the recoil produces the backward movement ofthe stock a, which moves in the butt I), which is firmly held, so thatthe cylindrical part c is forced against the stationary plunger (1, andthe air contained in c, affording an elastic cushion or resistance, iscompressed, w 'le the liquid contained in c is forced through theopenings 6 of the collar or flange 6 and into the space between 6 and f,the air and liquid brakes thereby completely absorbing the recoil. Thespring g is at the same time compressed, and toward the completion ofthe recoil it again presses the stock forward into the positionrepresented in the drawings. The rear end of the piston d and of theplunger h are fixed in the butt I) by means of screws (1" h in such amanner that the position of the piston d in the brake-cylinder c and thetension of the spring 9 may be regulated in accordance with requirementsby turning these screws.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is r 1. In a firearm, the combination with the stockand butt movable relatively to each other; ofa liquid-containing member,and means interposed between the stock and butt to displace and toretain the liquid in said member, for the purpose specified.

2. In a firearm, the combination with the stock and butt movablerelatively to each other; of a liquid and air containing cylinder, apiston in saidcylinder interposed between the stock and butt adapted tocompress the air, and means on the piston to displace the liquid in thecylinder.

3. In a firearm, the combination with the stock and butt movablerelatively to each other and a differential cylinder for air and liquidin said stock; of a differential piston on the butt, the portion of saidpiston of greater diameter provided with perforations, for the purposeset forth.

4. In a firearm, the combination with the stock and butt movablerelatively to each other and a differential cylinder for air and liquidin said stock; of a differential piston on the butt adjustablerelatively to the cylinder and having its portion of greater diameterprovided with perforations, for the purpose set forth.

5. In a firearm, the combination with the stock and butt movablerelatively toeach other; of a liquid and gas containing cylinder, apiston interposed between the stock and butt adapted to compress the gasand displace the liquid in the cylinder, and means to move the butt intonormal position relatively to the stock after said compression anddisplacement.

6. In a firearm, the combination with the stock and butt movablerelatively to each other; of a differential cylinder in said stock forair and a liquid, a second cylinder or bore in said stock and a coiledspring contained therein; of a differential piston on the butt Workingin said differential cylinder and having its portion of greater diameterprovided with perforations, and a second piston fitting the secondcylinder or bore in the stock andflJ. acted on by the aforesaid spring,both said pistons ad ustable relatively to their cylinders,substantially as and for the purpose set forth.

BURKARD BEHR. Witnesses:

MAX LEMoKE, IDA CHRIST. I'IAFERMANN.

